[media] dvb_frontend: print a msg if a property doesn't exist

If userspace calls a property that doesn't exist, it currently
just returns -EINVAL. However, this is more likely a problem at
the userspace application, calling it with a non-existing property.
So, add a debug message to help tracking it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 0c6f936ffac8..b059abf572d6 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -1479,6 +1479,9 @@ static int dtv_property_process_get(struct dvb_frontend *fe,
                 tvp->u.st = c->block_count;
                 break;
         default:
+                dev_dbg(fe->dvb->device,
+                        "%s: FE property %d doesn't exist\n",
+                        __func__, tvp->cmd);
                 return -EINVAL;
         }